Introduction to Tu ethnic altar: The Tu ethnic altar has two floors with a total height of 9.8 meters. The first floor is 6 meters high and the second floor is 3.8 meters high. It is 42 meters wide from north to south and 15.8 meters long from east to west. This is the place where the Tu people hold large-scale sacrificial activities such as offering sacrifices to heaven, ancestors, family gods, and divine arrows.